<template>
  <div class="list" ref="wrapper">
    <div>
        <div class="area">
        <div class="title  border-topbottom">当前城市</div>
            <div class="button-list">
            <div class="button-wrapper">
                <div class="button">{{this.$store.state.city}}</div>
            </div>
            </div>
        </div>
        <div class="area">
        <div class="title  border-topbottom">热门城市</div>
            <div class="button-list">
              <div class="button-wrapper" 
              v-for="item of hot" :key="item.id" 
              @click="handleCityClick(item.name)"
              >
                  <div class="button">{{item.name}}</div>
              </div>
            </div>
        </div>
        <div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
        <div class="title border-topbottom ">{{key}}</div>
          <div class="item-list">
              <div class="item border-bottom" 
              v-for="innerItem of item" :key="innerItem.id"  
              @click="handleCityClick(innerItem.name)"
              >{{innerItem.name}}</div>
          </div>
        </div>
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'
export default {
    props: {
      hot:Array,
      cities:Object,
      letter: String
    },
    name:'CityList',
    mounted () {
        this.scroll = new BScroll(this.$refs.wrapper,{observeDOM:true})
    },
    methods: {
      handleCityClick (city) {
       this.$store.commit('changeCity',city)
       this.$router.push('/')
      }
    },
    watch: {
      letter () {
        if(this.letter) {
          const element = this.$refs[this.letter][0]
          this.scroll.scrollToElement(element)
        }
      }
    }
}
</script>

<style lang="stylus" scoped>
  @import '~@/assets/styles/varibles.styl'
  .border-topbottom
    &:before
      border-color #ccc
    &:after
      border-color #ccc
  .border-bottom
    &:before
      border-color #ccc
  .list
    overflow hidden
    position absolute
    top 1.58rem
    bottom 0
    right 0
    left 0
    .title
      line-height .54rem
      background-color #eee
      padding-left .2rem
      color #666
      font-size .26rem
    .button-list
      padding .1rem .6rem .1rem .1rem
      overflow hidden
      .button-wrapper
        width 33.33%
        float left
        .button
          text-align center
          padding .1rem 0
          boredr-radius .06rem
          margin .1rem
          border .02rem solid #ccc
    .item-list
      .item
        line-height .76rem
        padding-left .2rem 
</style>